[PATCH v4 19/21] ibmvfc: purge scsi channels after transport loss/reset
From: Tyrel Datwyler <tyreld@linux.ibm.com>
Date: 2021-01-12 00:50:06
Also in:
linux-scsi, lkml
Subsystem:
ibm power virtual fc device drivers, linux for powerpc (32-bit and 64-bit), scsi subsystem, the rest · Maintainers:
Tyrel Datwyler, Madhavan Srinivasan, "James E.J. Bottomley", "Martin K. Petersen", Linus Torvalds
Grab the queue and list lock for each Sub-CRQ and add any uncompleted events to the host purge list. Signed-off-by: Tyrel Datwyler <tyreld@linux.ibm.com> --- drivers/scsi/ibmvscsi/ibmvfc.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+)
diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c
index 24e1278acfeb..b413f5da71ce 100644
--- a/drivers/scsi/ibmvscsi/ibmvfc.c
+++ b/drivers/scsi/ibmvscsi/ibmvfc.c@@ -1056,7 +1056,13 @@ static void ibmvfc_fail_request(struct ibmvfc_event *evt, int error_code) static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) { struct ibmvfc_event *evt, *pos; + struct ibmvfc_queue *queues = vhost->scsi_scrqs.scrqs; unsigned long flags; + int hwqs = 0; + int i; + + if (vhost->using_channels) + hwqs = vhost->scsi_scrqs.active_queues; ibmvfc_dbg(vhost, "Purging all requests\n"); spin_lock_irqsave(&vhost->crq.l_lock, flags);
@@ -1064,6 +1070,16 @@ static void ibmvfc_purge_requests(struct ibmvfc_host *vhost, int error_code) ibmvfc_fail_request(evt, error_code); list_splice_init(&vhost->crq.sent, &vhost->purge); spin_unlock_irqrestore(&vhost->crq.l_lock, flags); + + for (i = 0; i < hwqs; i++) { + spin_lock_irqsave(queues[i].q_lock, flags); + spin_lock(&queues[i].l_lock); + list_for_each_entry_safe(evt, pos, &queues[i].sent, queue_list) + ibmvfc_fail_request(evt, error_code); + list_splice_init(&queues[i].sent, &vhost->purge); + spin_unlock(&queues[i].l_lock); + spin_unlock_irqrestore(queues[i].q_lock, flags); + } } /**
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2.27.0